Mr. Mollenkopf recently joined the board of Midstream Management. Prior to retirement in October 2016, Mr. Mollenkopf was the executive vice president and chief operating officer for MarkWest operations of MPLX GP LLC and for MarkWest prior to its acquisition by MPLX in 2015. Mr. Mollenkopf joined MarkWest Hydrocarbon in 1996 and held various positions of increasing responsibility prior to being named chief operating officer in 2011. Prior to working for MarkWest, Mr. Mollenkopf worked for ARCO Oil and Gas Company, holding various positions in process and project engineering, as well as operations supervision. Mr. Mollenkopf received a bachelor’s degree in mechanical engineering from the University of Colorado at Boulder.